Bridgestone Tour B330-RXS Golf Balls The Amatour Core is 28% softer than the average tour ball core and utilizes a steeper gradient in softness from the inner part of the core to the outer region, resulting in faster ball speed and more reduced spin off the driver than ever before. The newly formulated SlipRes Cover has the highest friction coefficient rating possible for maximum greenside spin AND reduced spin off the driver for longer distance. SlipRes also delivers a self-repairing cover for longer playability. Seamless Cover Technology (SCT) is a proprietary manufacturing process that eliminates the straight part line and results in the most consistent golf ball in terms of accuracy, distance and trajectory ever created. Our proprietary dual dimple cover pattern feature smaller inner dimples that further reduce drag at launch for faster elevation, while the larger outer dimples promote a shallow angle of descent for increased rollout on landing.